It appears that you have listed my mailserver as a source of spam and it is preventing us from communicating with our customer. This is some the the text of the NDR:
<crpowa1.structural.net #5.5.0 smtp;554 Service unavailable; Client host [126.96.36.199] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?188.8.131.52>
When I checked your site this is what I was given as a reason why we were listed:
Causes of listing
System has sent mail to SpamCop spam traps in the past week (spam traps are secret, no reports or evidence are provided by SpamCop)
SpamCop users have reported system as a source of spam less than 10 times in the past week
Please advise as to how I can get us off your list.